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Go Back   SailNet Community > On Board > Gear & Maintenance > GPS via cell phones
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Thread: GPS via cell phones Reply to Thread
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Topic Review (Newest First)
12-22-2009 05:08 PM
captsmoe
iPhone Apps

I just mentioned on other thread that I use iNavX. It is very good to use as a reference, but constant access does drain the battery.

Apps that require a brief visit, like tide apps, are really helpful.

There are free apps that proffer limited info or just data bases of info to search through, but few that provide fast access to information. AquaLights is another example of an app that gives you fast access to critical info.

YouTube - AquaLights - iPhone App by Aquaous
09-13-2009 12:51 PM
sanderling
Have navionics mobile gone mad?

Thx Negrini, glad u like Navionics mobile. You are not the first to comment on the pricing. And it would be disingenuous of me to claim charity for economy weary boaters. A couple reasons amoung others for the price difference:
as cool as the Iphone is it is a smartphone and not an E series so it was felt we might be seen as gouging were we to solicite mobile purchases from existing customers who are btw our best advertising. Further we want new customers like every company. For us new customers may not today own a plotter or even a boat!! And these folks (iPhone users) we feel expect their apps to be free or inexpensive.
09-13-2009 12:16 PM
negrini Sanderling, I just downloaded the SouthAmerica portion into wife's iPhone. I'm astonished how brilliant and detailed the maps shows for our homeground. It's almost the same Navionics we use on our E120 !! (at 20x cost difference ) I think our local Raymarine representative are doing a nice job updating/editing the charts, and regardless your mad price strategy, I must admit this is the best one I've found for my area. I'll spread the word .....
09-13-2009 06:21 AM
sanderling
Iphone makes a great backup....good navigator as well?

There are a number of Apps for the iPhone that are generating great interest from mariners this year. (disclosure I work for Navionics). Feed back we have gotten is that at worst the Navionics App for Iphone makes a great back up, planning and route sharing tool. Navionics has spent 25 years optimizing vector charts for small screens so the iPhone match is a natural. Some actually consider it a bona fide hand held gps. The Iphone screen is great in sunlight,, the maps reside in the onboard memory. This fact along with the active gps reciever in the Iphone 3g models means that a cell signal is not necessary.
Caveats are that a good water-resistant or waterproof case is needed. I use an Otterbox. Also power management is tricky, (read short once the gps is turned on). Other companies to see are XTraverse by Fugawi and INav-X depending on the functionality you want.
09-13-2009 05:15 AM
lynger1
Quote:
Originally Posted by ban3 View Post
Does anyone know if there are any good products out there for navigating using cell phone based GPS? I'm thinking about buying a smart phone with built in GPS and would love if it could double for a handheld GPS unit on the boat.

Thanks!
I used on on my old boat
There is one on ebay could be of intrers for you
GPS + mobile Moter home Boat & Controller - eBay Electronics, Parts, Accessories, Boats, Watercraft, Cars, Bikes, Boats. (end time 23-Sep-09 09:43:41 AEST)

coppy link
Regards
09-13-2009 03:33 AM
davidpm Turning on certain extra fuctions on a iphone can use up the battery very fast.
It would be prudent to check battery usage before depending on it.
09-12-2009 09:39 PM
negrini Sean, iPhone, N95, N96, N97 and several other does use either GPS or tower triangulation, depending on your preference set for "my location" feature.These Nokias and Apple does track real GPS as well. The only drawback are they use a slow 5 channel receiver (I mean, slow locking), what make sometimes useless at town, but great for outdor. There are also several applications to track your speed that includes fixed radar inspection points that warns you as you get close. Also their screen suffice for an eventual use, and doesn't require a laptop at all (that's the good part) I'm an old Palm user, and don't regret the change ....
09-12-2009 08:09 PM
CarpeDiemGators Hey guys,
I just wanted to make sure you all keep in mind that the majority of cell phones which market "GPS" capability in fact do not use GPS (global positioning system) at all!

Nearly any cell phone can use cell phone tower triangulation to give a pretty descent approximation of where you are - my Palm Centro (great smartphone btw) using the Google Maps "My Location" functionality gives me position to about 1000 ft. However, this functionality does not work at all if you are not on land! This is because your cell phone radio is simply not strong enough to transmit to 3 different cell phone towers simultaneously when off shore. Also, the typical position accuracy of a real GPS is 10' or less - 100X better than cell phone triangulation.

That said, if you DO get a phone that has real GPS capability (it recieves signals from 6-10 sattelites orbiting the earth), you need to investigate if it can transmit the position information (via USB perhaps) to other devices (i.e. a PC). There are definitely plotting tools you can use if you can get the position info to a PC.... but realistically, the integrated plotting features of marine GPS units (i.e. Garmin) is probably worth it!

-Sean
S/Y Carpe Diem
Wilmington, CA
09-12-2009 07:53 PM
negrini Guys, do they provide charplotting capability on cell as well ?
09-12-2009 05:26 PM
bossk I bought the Navionics software for my iPhone, I don't use it much as I have a proper chart plotter on the boat but it makes for a great backup, as long as you are in an area where your phones assisted GPS will actually work. I use the tide and current functions on it at work when I feel like planning an escape a fair bit too At $10 I'm happy with it.
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